By Rightful Advice 
As a seasoned legal analyst with extensive experience in tax litigation and regulatory frameworks, I examine the evolving landscape of lawsuits challenging tax increases across the United States. Recent federal and state-level developments, including the implementation of the One Big Beautiful Bill Act (OBBBA) signed in July 2025, have sparked new disputes over tax hikes, deductions, and enforcement. These cases often involve constitutional challenges, procedural disputes, and questions of agency authority, reflecting broader tensions between taxpayers, businesses, and governments seeking revenue amid fiscal pressures. This article provides an update on key tax rise lawsuits, drawing from court rulings and expert analysis to offer clarity for affected parties.
Disclaimer: This article is for informational purposes only and does not constitute legal advice. Tax laws are complex and subject to change; consult a qualified legal professional for personalized guidance.
Introduction
In early 2026, lawsuits challenging tax increases continue to proliferate, driven by state efforts to address budget shortfalls and federal changes under OBBBA that, while extending tax cuts, have prompted disputes over retroactive applications and enforcement. Property tax hikes, in particular, have faced scrutiny in states like Oklahoma and Delaware, where courts have recently ruled on financing mechanisms and rate differentiations. Income and sales tax challenges also persist, with businesses contesting restrictions on deductions and new digital taxes.
These disputes matter now as states implement 2026 tax changes, including rate adjustments and exemptions, amid economic uncertainty. Taxpayers in high-cost states may see relief or burdens shift, while businesses navigate compliance risks. Impacted groups include homeowners facing property reassessments, small businesses challenging sales tax expansions, and industries like cannabis seeking deduction rights. This surge in litigation underscores the need for balanced revenue strategies that respect constitutional limits.
Background & Legal Context
Tax increases have long been contentious, rooted in constitutional principles like the Equal Protection Clause and state uniformity requirements. The U.S. Constitution’s Takings Clause, for instance, has been invoked in property tax forfeiture cases, as seen in the 2023 Supreme Court ruling in Tyler v. Hennepin County, which limited governments’ ability to retain surplus proceeds from tax sales. At the federal level, the 2017 Tax Cuts and Jobs Act (TCJA) capped state and local tax (SALT) deductions at $10,000, prompting ongoing challenges; OBBBA raised this to $40,000 in 2025 but phased it out for high earners, fueling disputes over equity.
State-by-state variations add complexity. In 2025, many states enacted or proposed hikes to offset pandemic-era spending, including property tax adjustments tied to inflation and sales tax expansions on digital services. Legislative intent often emphasizes revenue for public services, but challengers argue these violate due process or exceed authority, as in Public Law 86-272 disputes limiting state income taxes on out-of-state sellers. Prior rulings, such as the Supreme Court’s Loper Bright decision in 2024, overturning Chevron deference, have empowered more challenges to IRS and state agency interpretations.
Key Legal Issues Explained
Tax rise lawsuits typically hinge on several core concepts, explained here in plain English with references to established legal standards.
- Property Tax Challenges: These often involve “split-rate” systems differentiating residential and non-residential rates, as permitted under statutes like Delaware’s House Bill 242. Challengers claim violations of uniformity clauses in state constitutions, arguing for unequal burdens on commercial owners. Common procedures include administrative appeals to assessment boards, followed by judicial review.
- Income Tax Hikes and Deductions: Businesses, especially in regulated industries like cannabis, contest IRC Section 280E, which denies deductions for Schedule I substances despite state legalization. This effectively increases taxable income, leading to overpayment claims in Tax Court. Seventh Amendment challenges question IRS penalty impositions without jury trials.
- Sales Tax Litigation: Expansions to digital advertising or services face nexus challenges under South Dakota v. Wayfair (2018), requiring economic presence for taxation. States like Maryland and Washington have seen suits over “digital ad taxes,” alleging discrimination against interstate commerce.
- Free Speech in Tax Debates: Elected officials’ rights to discuss proposed hikes are protected under the First Amendment, as in recent censure cases where boards punished members for public comments.
These issues implicate rights like due process (fair notice and hearings) and equal protection, with implications for fiscal policy.
Latest Developments or Case Status
As of February 2026, several high-profile rulings and filings highlight active litigation.
- Federal Level: In New Mexico Top Organics – Ultra Health v. Commissioner, the U.S. Tax Court is reviewing whether Section 280E applies to state-legal cannabis operations, with briefing ongoing and a decision expected in spring 2026. Amicus briefs from industry groups underscore the case’s potential to reduce effective tax rates for cannabis firms. Employee Retention Credit (ERC) disputes continue post-Loper Bright, questioning IRS guidance on eligibility. Former President Trump’s $10 billion lawsuit against the IRS for tax record leaks remains in early stages in Miami federal court.
- State-by-State Highlights:
- Oklahoma: On February 3, 2026, the Oklahoma Supreme Court affirmed a lower court’s ruling in a challenge to Norman’s tax-increment financing (TIF) district for an entertainment arena, finding the referendum petition insufficient. This allows the project to proceed without a public vote, diverting sales and property taxes for development.
- Delaware: In November 2025, the Delaware Supreme Court upheld House Bill 242 in Newark Property Association v. State, denying challenges to split-rate property taxes for 2025-2026, allowing temporary resets between residential and non-residential properties.
- Michigan: On February 3, 2026, Rochester Community Schools board member Carol Beth Litkouhi filed a lawsuit against the board for censuring her over public comments on a proposed tax increase, alleging First Amendment violations.
- Georgia: Senate Bill 382, passed in early 2026, mandates a homestead exemption tying property tax increases to inflation, with a 1-cent sales tax offset. This follows unanimous approval of related exemptions, amid debates on local opt-outs.
- Kentucky: A January 2026 proposal seeks a constitutional amendment to freeze property assessments for seniors over 65, requiring three-fifths legislative approval.
- Other States: Maryland’s digital ad tax faces ongoing suits, with similar challenges in Washington. New York Mayor Mamdani renewed calls for wealth and corporate tax hikes in February 2026, potentially sparking future litigation.
These cases are at various stages: some in discovery, others awaiting appeals.
Who Is Affected & Potential Impact
Homeowners in states with rising property values, like Georgia and Kentucky, face higher bills unless exemptions apply, impacting retirees on fixed incomes. Businesses, particularly in tech and cannabis, risk increased liabilities from denied deductions or new sales taxes, potentially raising costs passed to consumers. Local governments could lose revenue if rulings favor challengers, affecting services like education.
Potential outcomes include refunds, policy reversals, or settlements, as in past ERC cases. Broader impacts: economic drag from “tort taxes” in litigious areas like St. Louis, costing residents $1,653 annually.
| Affected Group | Key Impacts | Examples |
|---|---|---|
| Homeowners | Higher assessments; potential exemptions for seniors | Kentucky proposal freezes for 65+; Georgia ties to inflation |
| Businesses | Deduction denials; new digital taxes | Cannabis firms in Tax Court; ad tech in Maryland |
| Governments | Revenue shortfalls if rulings limit hikes | Oklahoma TIF upheld, preserving funding |
| Elected Officials | Speech restrictions in debates | Michigan censure lawsuit |
What This Means Going Forward
These lawsuits signal a trend toward stricter scrutiny of tax increases, influenced by Loper Bright and economic pressures. Legal significance: Courts may expand taxpayer rights, like jury trials for penalties. Public impact: Balanced budgets without overreliance on hikes could foster growth, but delays in IRS processing (up to 13 months for amended returns) harm refunds.
Readers should monitor SCOTUS dockets for 2025-2026 terms, state legislative sessions, and IRS guidance on OBBBA. Expert analysis suggests more challenges to agency deference, potentially reshaping tax enforcement.
Conclusion
The tax rise lawsuits update reveals a dynamic field where recent rulings uphold some increases while others face robust challenges, emphasizing the need for fair, transparent tax policies. As states and the federal government navigate fiscal demands, these cases highlight the balance between revenue needs and taxpayer rights. Staying informed through reliable sources like U.S. Tax Court announcements and state supreme court decisions is essential for those affected. This ongoing litigation reinforces the public interest in equitable taxation, encouraging vigilance and participation in civic processes.
Frequently Asked Questions
What are the main grounds for challenging property tax increases?
Challenges often cite state constitutional uniformity requirements or federal Takings Clause violations, as in forfeiture surplus cases.
How does OBBBA affect ongoing tax lawsuits?
It extends TCJA cuts but introduces retroactive changes, prompting disputes over IRS implementation and penalties.
Are digital ad taxes constitutional?
Courts are split; challenges under the Commerce Clause argue they discriminate against interstate businesses.
Can elected officials be punished for discussing tax hikes?
No, as it violates First Amendment rights; recent filings like Michigan’s seek to protect such speech.
What relief might taxpayers get from successful lawsuits?
Refunds, injunctions against hikes, or policy changes, though appeals can prolong resolution.
How do state sales tax changes in 2026 impact litigation?
New rates and exemptions (e.g., food tax repeals in Arkansas, Illinois) may reduce some disputes but spark others over nexus.
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